Graduating-machine.



G. G. TREPETHEN. GRADUATING MACHINE. APPLICATION rmzn NOV. 5, 1910.

- Patented Nqv .18, 1913.

3 SHEETS-SHEET 1.

COLUMBIA PLANouRM-n CO..\VASHINOTON. I). c.

G. G. TREPETHEN.

GRADUATING MACHINE. APPLIOATION FIL EIJ NOV. 5, 1910. 7 1,079,306. Patented Nov. 18, 1913.

COLUMBIA iLANouRAPH CO.,WA5HINO'N)N. n. c.

G. G. TREPETHEN.

GRADUATING MACHINE.

APPLIOATION FILED NOV. 5, 1910.

1,079,306. Patented Nov. 18, 1913.

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UNITED STATES PATENT OFFICE.

CHARLES Gr. TREFETHEN, OF ERIE, PENNSYLVANIA; ASSIGNOR TO MODERN TOOL COMPANY, A CORPORATION OF PENNSYLVANIA.

GRADUATINGr-MACHINE.

Specification of Letters Patent.

Patented Nov. 18, 1913.

To all whom it may concern:

Be it known that I, CHARLES G. TREFETHEN, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Graduating-Machines, of which the following is a specification.

This invention relates to graduating machines, and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.

The object of the invention is to graduate scales wherever such devices may be used, placing upon the plate used for the purpose a series of cuts, or marks, graduated as may be desired, ordinarily with a pre-determined cycle of varying lengths.

Figure 1 shows a plan view of the machine. Fig. 2 a side elevation of themachine. Fig. 3 an end view of the machine. Fig. 4 a section on the line 44 in Figs. 1 and 5. Fig. 5 a section on the line 55 in Fig. 4. Fig. 6 an end view of the stop wheel. Fig. 7 a section on the lines 7 7 in Fig. 9. Fig. 8 an end view of the stop wheel actuating mechanism. Fig. 9 a side view of the same mechanism. Fig. 10 a plan view of the scale holder. Fig. 11 a section on the line 11-11 in Fig. 10. Fig. 12 a section on the line 1212 in Fig. 11. Fig. 13 a plan view of the cutting end of the machine, showing an alternative feeding construction. Fig. 14 a side elevation of the same parts. Fig. 15 an enlarged plan view of the feed stop. Fig. 16 an enlarged end elevation of the same parts.

1 marks the base of the machine. The guides 2 are mounted on the base. The tool holder slide 3 operates in these guides, the slide having the lips 4 Figs. 3 and 16, and the guides have the overlapping lip plates 5 to lock the slide in place in the guides. A tool holder 6 is placed in the tool socket 7 (see dotted lines Figs. 1 and 2) and secured in place therein by a set screw 8. The cutting tool 9 extends through the perforation 10 in the tool holder 6 and is secured in place therein by the set screw 11.

The scale holder 12 in the preferred construction shown in Figs. 1, 2 and 3 is carried by a swinging arm 13. This arm is pivotally mounted by means of the screw 14, the arm has the perforations 15 and 16 of a size to receive the screw 14, by means of which the length ofthe arm may be varied to vary the radius of the scale as desired. The scale holder rests on the base, and the friction is sufficient to hold it in place as it 1s moved along by the feed. A scale 17 as shown in Fig. 1 is secured on the scale holder 12 by means of the screws 18. These scales ordinarily have perforations for securing them in their final place for use so that this forms a convenient means for attaching the scale to the scale holder.

The machine is driven by a drive pulley 19, which is journaled on the shaft 20, the shaft 20 has a socket extending from its end inwardly, and a clutch rod 22 extends into this socket. The rod is locked against rotation relatively to the shaft by means of the pin 23 which extends into the socket 24 in the shaft 20. The pulley is provided with the detents 25 on its outer face, and these are adapted to be engaged by the detents 27 on the head 26, the head being arranged on the rod 22. A knob 28 is provided on the head, and by means of this knob, the clutch rod may be pushed in and out so as to bring the detents 25 and 27 forming the clutch into and out of engagement. A thrust collar 20 is secured on the end of the shaft to hold the pulley in place.

The shaft 20 is journaled in the bearing 29 arranged on the post 30 extending upwardly from the base.

A crank disk 31 is fixed on the end of the shaft 20 opposite the pulley 19. It is provided with a crank pin 32. The pitman 33 is journaled on the crank pin, and is con nected with a reciprocating driving pin 34 by means of the joint 35. slidingly mounted in the bearing 36 on the top of the slide 3, the end of the pin extending into a socket 37 in a lug 37 in the upper side of the slide 3. A collar 38 is fixed on the pin 34 by means of the set screw 39. A spring 40 is arranged around the pin and rests against the lug 37 and the collar 38 and yieldingly holds the pin against the thrust of the crank. The purpose of this yielding connection is to provide a convenient means for varying the lengths of the graduations on the scale. WVith this yielding connection, it is possible to use a mechanism producing a uniform reciprocation, as the crank in the present-machine, and to vary the length of the graduations'by interposing stops limiting the movement of the slide 3.

The pin 34 is A lug 41 extends upwardly from the slide 3 and the stop 42 is secured in this lug by means of the set screw 43. This stop engages different faces on a stop wheel 44 Figs. 1 and 6 and the length of the cut is thus limited as desired. The stop wheel is fixed on the shaft 45. This shaft is journaled in a hearing 46 carried by a post 47 Fig. 7 secured on one of the guides, and is thus carried by the frame. A ratchet wheel 48 is fixed on the shaft 45 by means of the key 48 A rock arm 49 is journaled on the shaft 45, and secured in place thereon by means of the nut 50 which is screwed up against the shoulder 51 on the end of the shaft 45. A spring pawl 52 Figs. 7 and 8 is secured on the arm 49 by means of the screw 53. The pawl has the finger 54 which is adapted to engage the teeth of the ratchet wheel 48 as the arm 49 is rocked. A holding pawl 55 Figs. 1 and 9 is secured on the bearing 46 by means of the screw 56 Fig. 1 and locks the ratchet wheel against the return movement upon the return movement of the rock arm 49. A hearing block 57 Figs. 7 and 9 is pivotally secured in the arm 49 by means of a screw 58. The arm is provided with a series of screw threaded openings 59 so that the radial position of the block 57 may be varied to vary the throw cf the rock arm as desired. An eccentric rod 60 is adjustably secured to the bearing block 57 by means of the nuts 61 which are secured on the rod 60. The rod 60 is connected with an eccentric strap, 62 Figs. 1 and 4 which is mounted on the eccentric 63. The eccentric is fixed on the shaft 20 by means of the screw 64. It can be readily seen that as the shaft 20 rotates the eccentric and rod give an oscillating movement to the arm 49 and thus through the ratchet wheel intermittently rotates the shaft 45 and the stop wheel 44. The stop wheel has the stop faces 44 so that for each I rotation of the stop wheel there is a given cycle of stop faces of varying radii so that the graduations on the scale are similarly varied, repeating the cycle with each rotation of the stop wheel.

- Th top wheel as shown in Fig. 6 is designed to make a scale 17 as is shown in Fig. 10'.

The scale holder 12 has an automatic feed for spacing the scale. The scale holder 12 has the ratchet bar 65. A pawl 66 Figs. 1 and 11 is adapted to engage this ratchet. The pawl slides freely over the ratchet bar 65. A guide 66 is secured to the pawl and extends down each side of the bar 65 so as to hold the pawl in place thereon. The pawl is pivotally mounted on the arm 67 Fig. 1 and the arm 67 is pivotally mounted by means of the screw 68, on a lug 69 extending from the base of the machine. An arm 7 O is secured on the arm 67 forming a bell crank therewith. A link 71 is pivotally connected on the arm 70. The opposite end of the link is connected on the lever 72. The lever 7 2 is pivo-tally mounted on the frame by means of the screws 73. An adjusting screw 74 is arranged on the end of the lever 72, in the path of the end of the slide The screw 74 is locked in adjustment by means of the nut 75. A spring 76 Fig. 1 is secured on the base by means of the screw 77 and to the link 71 by means of the collar 78. This spring is I tensioned to effect the return movement of the ratchet pawl 66. An arm 79 extends from the arms 67 and and an adjusting screw 80 extends from this arm and is locked in adjustment by the nut 81.

The operation of the feed mechanism is as follows: As the slide 3 is drawn back, it engages the screw 74, and moves the lever 72. This movement is communicated through the rod 71 to the arm 70 and thence through the arm 67 to the pawl 66. As the slide 3 moves forward, the spring 76 effects the return movement of these parts. By adjusting the screws 80 and 74, the throw of the pawl 66 may be nicely controlled so as to give the exact throw of pawl desired. Ordinarily there will be one ratchet tooth in the ratchet bar 65 for each graduation on the scale. At the completion of the scale, the cutter is automatically thrown out of action by the following mechanism: The stop plate 82, (see Figs. 3, 15 and 16) has the slots, 83. Screws 84 extend through these slots 83 for securing the stop plate 82 on the end of one of the guides 2. A spring 85 extends from the pin 86 on the plate 5 to a pin 87 on the stop plate 82, and tends to move the stop plate forward so as to bring the end of the stop plate into the path of the lip 4, on the slide 3. The plate 82 has a notch 88. A pawl 89 extends into this notch for locking the stop plate 82 normally out of the path of the slide 3. The pawl 89 is pivotally mounted on the screw 90, the screw 90 being socured to the base. An arm 91 extends from the pawl 89 forming a bell crank therewith and an adjusting screw 92 is arranged in this arm. This screw is in the path of the arm 13 so that when the desired length of scale is completed, the arm 13 engaging the screw 92, throws the pawl 89 out of the notch 88, thus allowing the spring 85 to snap the stop 82 into the path of the slide 3, and while the slide may continue to reciprocate, it is stopped in a position to prevent the cutting of the scale, the yielding connection afforded through the spring 40 Fig .1 allows the crank to continue to rotate without amming the parts.

The machine herein shown is designed to graduate different kinds of scales, and in Figs. 13 and 14 I have shown the machine adapted to graduate a disk having a beveled surface. For this machine, the parts of the machine are similar to those described herein, except that instead of the scale holder, there is arranged a support 93 with a slanting arm 93*. A pin 94 extends outwardly from the arm 93 and the disk 95 is j ournaled on this pin and secured in place thereon by a nut 96. A ratchet feed wheel 97 is also journaled on a pin 94: and is secured by any convenient means (not shown) to the disk 95. The ratchet pawl 98 is carried by the arm 67 and engages the ratchet wheel97, the pawl being held in engagement with the ratchet wheel 97 by means of a spring 99. The pawl 89 is not operated when the machine is arranged as shown in Fig. 13 for cutting a disk.

Briefly, the machine operates as follows:

The slide 3 is reciprocated through the action of the crank 32. It carries the tool holder (3 and cutting tool 9. The tool holder is slidingly mounted on the tool holding slide 3 and is forced forward through the action of the spring 40. The stop wheel 44 is intermittently actuated from the eccentric on the drive shaft and presents faces of different radial length to a stop 42 on the slide 3. The spring 40 is of suflicient strength to force the tool forward but still yields when the stop 12 comes in contact with the stop wheel 4 1 so as to permit the completion of the movement of the crank 32. In this way varying lengths of graduations is accomplished. The stop wheel has the stops arranged in the proper cycle to give the variations as desired.

The scale holding bar 13 has a series of ratchet teeth on its face. These are ordinarily graduated so as to have one tooth for each graduation on the scale. The ratchet pawl 66 operates on the ratchet plate and the pawl is driven through the bell crank lever 67, 70, rod 71 and lever 72. An adjusting screw 74 is arranged in the lever 72 for adjusting the forward throw of the pawl and the screw 80 is arranged in an arm 7 9 extending from the lever 67 for limiting the return throw of the pawl. In this way, the throw of the pawl may be so adjusted as to pick up one tooth of the ratchet plate with each stroke. At the completion of the scale, the arm 13 contacts the screw 92 and the arm 91 of a bell crank lever carrying the pawl 89. The pawl 89 holds the stop plate 82 out of the pat-h of the lip 4 on the slide 3. When, however, the scale holding bar 13 throws the pawl 89, the plate 82 is released and the spring 85 snaps it in front of the lip 4, thus limiting the forward movement of the slide 3. The spring 10 yields suificiently when the slide is so stopped to permit of the continued movement of the crank.

Where a disk is being operated upon as in Fig. 13 there is no particular injury done if the disk continues beyond the full circle in that the cutting tool moves in the same space as on the first turn. It is not necessary, therefore, to form a positive stop as with the mechanism released by the pawl 89 and where the length of the graduations is limited.

What I claim as new is:

1. In a graduating machine, the combination of a cutting tool; a scale holder; means for reciprocating the tool and holder relatively to each other; mechanism acting on said means to limit its action for automatically varying the length of the cut; and devices driven with said means forautomatically feeding the cutting tool and holder relatively to each other to space the cuts.

2. In a graduating machine, the combination of a cutting tool and scale holder; a

I rotating driving means; devices on said rotating driving means for converting said rotating movement to reciprocating movement, said devices having a fixed throw; a

yielding mechanism actuated by saiddevices and reciprocating the tool and holder relatively to each other; andvarying stops acting against said yielding mechanism for limiting the movement of the tool and holder relatively to each other to vary the length of the cut.

3. In a graduating machine, the combina tion of a cutting tool and scale holder; a rotating driving means; devices on said rotating driving means for converting said .rotating movement to reciprocating move- .ment, said devlces having a fixed throw; a

yielding mechanism actuated by said devices and reciprocating the tool and holder relatively to each other; varying stops acting against said yielding mechanism for limiting the movement of the tool and holder relatively to each other to vary the length of the cut; and means for automatically feeding the cutting tool and holder relatively to each other to space the cuts.

4:. In a graduating machine, the combination of a cutting tool and scale holder; a rotating driving means; devices on said rotating driving means for converting said rotating movement to reciprocating movement, said devices having a fixed throw; a yielding mechanism actuated by said devices and reciprocating the tool and holder relatively to each other; varying stops act- .mg against said yielding mechanism for limiting the movement of the tool and holder relatively to each other to vary the length of the out; means for automatically feeding the cutting tool and holder relatively to each other to space the cuts; and means for automatically varying the stops driven with said rotating driving means.

5. In a graduating machine, the combination of a cutting tool; a rotating driying means; devices on said means for converting the rotating movement to a reciprocating movement, said devices having a fixed throw; a slide on which the tool is mounted;

a scale holder a yielding connection between saidldev'ices and the slide; and warfying stops for limiting the varying movement of the slide to vary the length of the out.

6. In a graduating machine, the-combination of rotating driving means; a cutting tool and scale iholder; devices :on said means for .oonater-ting :the rotating movement to a neciprocating means, said devices having a fixed throw .a :yielding mechanismactuated by said devices and reciprocating :the tool and holder relatively .to each other; a stop Wheel having sto faces :of naming radii acting against said yielding mechanism sto limit and vary the nut-ting movements; .dew nes :for automatically r tating said wheel w th means; and devices for automatiorally ieeding the cutting tool and holder relatively to each other to space the pets.-

7- In a g aduating machine, the eombinatien of a cutting tool; a :reeiprfecating slide on wh ch t e tool is moun ed; azseale holder; power dr ven yieldi g means in receipirocatingitih slide s op wheel, ha ing s ep ifacesof varying rad i foralimi ngnm varying th mev m ntiofithe slide ;a ratchet fixed on the stop Wheel; an oseillafiingjarm driven with aid. means and operat ng o the ratchet for intermitt ntly m vingit forward; and means f r eseiflating said arm- %8.., n a graduating machine, the combinatinn nf a slide; .a cutting ool mounted l censee e on :the slide; means jEOI' reciprocating the slide; ascale "holder; a ratchet-on thescale holder; a ratchet pawl for operating the ratchet on the scale holder; and mechanism actuated byltheslide for axztua-ting the pawl.

19. in a graduating machine, the combination of a slide; a cutting tool mounted on the :slide; means for reciprocating the slide; ascatle'holderga ratchet on the-scale holder; a ratchet pawl forioperating the ratchet on the scale holder; mechanism actuated by the=slide for actuating the pawl; and :means for adjusting said mechanism .to vary the throw of the pawl.

10. In a graduating machine, the combinationofa vslide; wont-ting tool mounted on the slide .a reciprocating driving vdevice} a spring connection between the said device and-.slide;;a varying stopdevice for varying the movement of :the :slide; a scale holder for holding a blank to be cut by said tool;

a ratchet on the .sea'le holder; a .pawl f0! actuating :the ratchet; and mechanism actuated by .the slide for actuating the pawl.

In testimony whereof I have hereunto set my hand in the presence oftwosubsorihing witnesses.

@HARnEs G. TREFETHEN.

Witnesses-z D.- zHlGBY, 'BLANCHE Human. 

